public void TestTrivialFixed()
{
var sss = new TrivialFixedShamirsSecretSharing();
var sh = sss.Split(129, 6, 3); /* split the secret value 129 into 6 components - at least 3 of which will be needed to figure out the secret value */
var newshares = new List <Tuple <int, int> >();
// newshares.Add(sh[1]);
// newshares.Add(sh[3]);
// newshares.Add(sh[4]); //[sh[1], sh[3], sh[4]]; /* pick any selection of 3 shared keys from sh */
newshares.Add(sh[1]);
newshares.Add(sh[2]);
newshares.Add(sh[3]); //[sh[1], sh[3], sh[4]]; /* pick any selection of 3 shared keys from sh */
Assert.Equal(129, sss.Join(newshares));
}
public void TestTrivialFixed_Matches_Trivial(int available, int needed)
{
var sss1 = new TrivialFixedShamirsSecretSharing();
var sss2 = new TrivialShamirsSecretSharing();
var secretInt = 129;
var split1 = sss1.Split(secretInt, available, needed);
var shares1 = split1.Select(x =>
{
var bytes = new byte[sizeof(int) * 2];
Array.Copy(BitConverter.GetBytes(x.Item1), 0, bytes, 0, sizeof(int));
Array.Copy(BitConverter.GetBytes(x.Item2), 0, bytes, sizeof(int), sizeof(int));
return(bytes);
});
var split2 = sss2.Split(secretInt, available, needed);
var shares2 = sss2.Shares;
//Assert.Equal(shares1, shares2);
var rand = new Random();
var indexOrder = split1.OrderBy(x => rand.Next()).Select(x => x.Item1 - 1).Take(needed);
// var joinShares1 = split1.Where(x => indexOrder.Contains(x.Item1));
// var joinShares2 = split2.Where(x => indexOrder.Contains(x.Item1));
var joinShares1 = indexOrder.Select(x => split1.ElementAt(x));
var joinShares2 = indexOrder.Select(x => split2.ElementAt(x));
Console.WriteLine($"Indexes : " + string.Join(",", indexOrder));
Console.WriteLine($"Indexes1: {joinShares1.Count()} " + string.Join(",", joinShares1.Select(x => x.Item1 - 1)));
Console.WriteLine($"Indexes2: {joinShares2.Count()} " + string.Join(",", joinShares2.Select(x => x.Item1 - 1)));
var join1 = sss1.Join(joinShares1.ToList());
var join2 = sss2.Join(joinShares2.ToArray());
Assert.Equal(secretInt, join1);
// Assert.Equal(join1, join2);
}